Game: Tyrian 2000 on Msdos

"Tyrian 2000 was originally called simply Tyrian and was published by Epic MegaGames. In 1999, the author added an additional episode to the game and released it as freeware. TYRIAN IS OUT! Epic MegaGames, Inc., a leading publisher of shareware games, announces Tyrian, an action-packed upward scrolling shooter in which the entire screen is ablaze with action! Featuring multi-level parallax scrolling, huge enemies and weapons, and full-screen animation, this shooter can take on the best games of its type on the Super Nintendo and Sega Genesis. Tyrian also features full modem, network, and serial play. Deliani Your ship's most powerful weapons spew hundreds of particles around, demolishing the weaker enemies in your path. It's no overkill, though when you reach the massive enemies within Tyrian, you'll need every ounce of firepower you can get. More than 30 levels in all, plus many extra hidden bonus levels, Tyrian will have you playing forever! Each level has different scenery, enemies, and hazards, creating a wonderful variety of gameplay. As you blast your way through levels, you earn cash which you can use to upgrade your ship. If you've played One Must Fall: 2097, the concept will be familiar. This adds a whole new strategic aspect to Tyrian, unlike any shooter seen before! There are nearly 100 various weapons, shields, power plants, and options to obtain!"
Each game uses different controls, most DOS games use the keyboard arrows. Some will use the mouse , "Alt" ,"Enter" and "Space bar".